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Questions and Answers
What is the conservation of electric charges principle?
What is the conservation of electric charges principle?
- The sum of electric charges of a body within a closed system is always decreasing.
- The sum of electric charges of a body within a closed system is always increasing.
- The sum of electric charges of a body within a closed system is always varying.
- The sum of electric charges of a body within a closed system is always constant. (correct)
What is the main difference between conductors and insulators?
What is the main difference between conductors and insulators?
- Conductors are made of metals, while insulators are made of nonmetals.
- Conductors allow electrons to move freely, while insulators do not. (correct)
- Conductors have a positive charge, while insulators have a negative charge.
- Conductors are always charged, while insulators are always neutral.
What happens when a charged object is brought close to a neutral object?
What happens when a charged object is brought close to a neutral object?
- The neutral object will be either attracted or repelled, depending on the type of charge. (correct)
- The neutral object will always be repelled by the charged object.
- The neutral object will always be attracted to the charged object.
- The neutral object will not be affected by the presence of the charged object.
What is the main difference between charging by conduction and charging by induction?
What is the main difference between charging by conduction and charging by induction?
Which type of material is considered a good conductor of electricity?
Which type of material is considered a good conductor of electricity?
What is the purpose of the Triboelectric Series?
What is the purpose of the Triboelectric Series?
What is the primary focus of electrostatics?
What is the primary focus of electrostatics?
Which particle has a positive electric charge?
Which particle has a positive electric charge?
What is the process called when an atom loses one or more electrons?
What is the process called when an atom loses one or more electrons?
According to the law of charges, what happens when two objects with the same charge interact?
According to the law of charges, what happens when two objects with the same charge interact?
What is the unit used to measure electric charge?
What is the unit used to measure electric charge?
What is the charge of a negative ion?
What is the charge of a negative ion?
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Study Notes
Electric Charges and Electrostatics
- An electric charge is a physical property of an object that causes it to be attracted toward or repelled from another charged object.
- There are two types of electric charges: negative (-) and positive (+).
- Like charges repel, while unlike charges attract.
Conservation of Charges
- The sum of electric charges of a body within a closed system is always constant.
Electrostatic Interactions
- Any charged object can attract a neutral object.
- Unlike charges attract, while like charges repel.
Materials and Electron Flow
- Conductors: allow electrons to move from one region to another (e.g., most metals).
- Insulators: do not allow electrons to move (e.g., nonmetals).
Electrostatic Charging
- Charging by Conduction: involves contact between a charged object and a neutral object.
- Charging by Induction: charging a neutral object without contact with a charged object.
- Rubbing two objects together can create an electric charge (similar to charging by conduction).
Triboelectric Series and Van de Graaff Generator
- The triboelectric series is a ranking of materials by their tendency to gain or lose electrons.
- The Van de Graaff generator is a device that produces static electricity.
Electricity and Magnetism
- Electricity is the study of electromagnetic phenomena that occur when there are no moving charges.
- Electrostatics is the study of interactions between electric charges that are at rest (or nearly so).
Ionization
- If one or more electrons are removed from an atom, it becomes a positive ion.
- If an atom gains one or more electrons, it becomes a negative ion.
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